document.write('<table border="1" width="800" align="center">');
for(var i = 1; i < 10; i++){
    if(i % 2 === 0){
        var bg = "red";
    }
    else{
        var bg = "";
    }
    document.write('<tr bgColor="'+ bg+'">');
    for(var j = 1; j<10; j++){
        document.write('<td>'+ (i * j)+'</td>');
    }
    document.write('</tr>');
};
document.write('</table>');


let str = "global对象中的转码函数"
let str1 = "global%u5BF9%u8C61%u4E2D%u7684%u8F6C%u7801%u51FD%u6570"
alert(escape(str))

alert(unescape(str1))

console.log(parseFloat(12));

//eval 执行
eval('let str2 = "global对象中的转码函数"')
alert(str2)